About This Chapter
1. Event Horizon: Definition & Overview
This lesson will explain the meaning of the term 'event horizon', and discuss the two main types: a black hole event horizon, and the observable universe event horizon. A short quiz will follow.
2. Gravitational Field: Definition & Formula
This lesson defines what a gravitational field is and some practical examples encountered in the real world. We also develop the equations governing the gravitational field and explain what the units of measurement mean.
3. Magnetic Poles: Definition & Shifts
You probably know that magnets have poles, labeled 'North' and 'South.' But do you know why? And did you know that the earth's magnetic poles are not permanent? You will learn about both topics in this lesson.
4. Magnetic Quantum Number: Definition & Example
Electrons in an atom are found within shells. These shells are further divided into subshells, which are further divided into orbitals. In this lesson, we will discuss the magnetic quantum number, which tells us about the orbitals an electron occupies.
5. Magnetic Reversals: Overview
Everybody knows that a compass points north. But do you know why? And would you be surprised to learn that it might point south some day? You will learn about our planet's changeable magnetic field in this lesson.
6. What are Electromagnetic Waves: Definition & Types
Explore electromagnetic (EM) waves, their features and how they differ from other waves. Learn how EM waves are organized on a spectrum based on the amount of energy they produce, from radio waves to gamma rays.
7. What is a Magnet? - Definition & Examples
In this lesson, you will learn what a magnet is and how it works at the atomic level. You'll also see how the earth's magnetic field works. A short quiz will follow.
8. What is an Electromagnet? - Definition, Uses & Parts
In this lesson, you'll learn what an electromagnet is, how it is used in a few real-life situations, and the parts that make it up. A short quiz will follow.
9. What is Electromagnetic Radiation? - Wavelength, Spectrum & Energy
Light, microwaves, X-rays, and cell phone transmissions are all examples of electromagnetic radiation. Read more about this fascinating, mostly invisible phenomenon that has been harnessed by humans for so many purposes. A quiz is included.
10. What is Solenoid? - Definition, Uses & Examples
In this lesson, you will learn what a solenoid is, how it relates to electromagnets, and how it is used in a few real-life situations. A short quiz will follow.
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Other chapters within the General Studies Science: Help & Review course
- Chemical Compounds & Bonds Overview
- Drawing Conclusions from a Scientific Investigation
- Electricity Fundamentals & Overview
- Energy & Heat Overview
- Essential Biology Concepts
- Essential Chemistry Concepts
- Essential Concepts in Physics
- Evolutionary Principles
- Food Webs Overview
- Foundations of Chemical Compounds & Bonds
- Foundations of Chemical Reactions, Acids, and Bases
- Foundations of Energy & Heat
- Fundamentals of Mechanics
- Lab Equipment for Scientific Study
- Measurement & the Metric System Fundamentals
- Nuclear Energy Fundamentals
- Planning a Scientific Investigation Or Experiment
- Plant & Soil Ecology
- Populations & Relationships in Ecology
- Sound & Light Waves
- Studying Biological Communities
- The Periodic Table, Atoms & Elements
- Using Data for Investigation & Experimentation